Accordin tae the 2001 census, Piraeus haed a population o 175,697 fowk athin its admeenistrative limits, makkin it the third lairgest municipality in Greece an the seicont lairgest athin the urban aurie o the Greek caipital, follaein the municipality o Athens. The municipality o Piraeus an several ither suburban municipalities athin the regional unit o Piraeus form the wider Piraeus Urban Aurie or Greater Piraeus, wi a total population o 466,065.